Might be used to dump a book the players find as well. You can sell any book at any book store, but somebody who really knows the demand for certain things can increase profit for everybody. Go to Comment
Classic fallback phrase: Iiiiiiiiinteresting. My only complaints are that the plots seem only mildly related to the location itself, and that there are only three of them. However, those are minor problems, and certainly don't detract from the usefulness of the location. Go to Comment
An original trap, but I fear the consequences should the party not make it. The TPK potential is too high, so I would have lowered the difficulty a bit, for instance by allowing idea checks to help them out with the quiz, or as val said, by allowing magic dispelling and such.